Use of soft X-radiography for early non-destructive detection of floral differentiation in Douglas fir buds (Pseudotsuga menziesii (Mirb) Franco) M Bonhomme, P Doumas, M Bonnet-Masimbert and R RageauAnn. For. Sci., 51 4 (1994) 381-389DOI: https://doi.org/10.1051/forest:19940404